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Another group at risk for vitamin b12 deficiency includes anyone over age 50, because as they age, some people are less able to absorb food-bound vitamin B12
The GHK-Cu topical vs injection question factors in too, since absorption rates differ between the two methods
Structural modification of JS-K is able to prolong its half-life, and combining JS-K with special nanoparticles can greatly improve its solubility and stability, 103,113 further improving its prospects for clinical applications
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